155043227 has 2 divisors, whose sum is σ = 155043228. Its totient is φ = 155043226.

The previous prime is 155043223. The next prime is 155043257. The reversal of 155043227 is 722340551.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 155043227 - 2² = 155043223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155043227.

It is not a weakly prime, because it can be changed into another prime (155043223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77521613 + 77521614.

It is an arithmetic number, because the mean of its divisors is an integer number (77521614).

Almost surely, 2^155043227 is an apocalyptic number.

155043227 is a deficient number, since it is larger than the sum of its proper divisors (1).

155043227 is an equidigital number, since it uses as much as digits as its factorization.

155043227 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 155043227 is about 12451.6355150639. The cubic root of 155043227 is about 537.2184667333.

Adding to 155043227 its reverse (722340551), we get a palindrome (877383778).

The spelling of 155043227 in words is "one hundred fifty-five million, forty-three thousand, two hundred twenty-seven".